Integrity Constraints
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The constraints you listed are Integrity Constraints in DBMS/RDBMS. They help maintain the accuracy and consistency of data. 1. NOT NULL Constraint Ensures that a column cannot have a NULL…
June 10, 2026
what is database ?and difference between dbmas and rdbms.
What is a Database? A Database is an organized collection of related data that is stored electronically and can be easily accessed, managed, and updated. Example: A college database may…
Dr.E.F.Codd Rules
Dr. E. F. Codd’s 12 Rules of Relational Database Management Systems (RDBMS) Dr. Edgar F. Codd proposed these rules to define what a true Relational Database Management System should be.…